Added User Agent Header:

- Also adds VERSION const to client.
- Includes 'PHP' in the PHP verson because.
- TODO: idenify HHVM and provide correct user agent
- Fixes #6

Author: tjlytle

src/Client.php

@@ -28,10 +28,11 @@
  */
 class Client
 {
+    const VERSION = '1.0.0-beta1';
+
     const BASE_API  = 'https://api.nexmo.com';
     const BASE_REST = 'https://rest.nexmo.com';
 
-
     /**
      * API Credentials
      * @var CredentialsInterface
@@ -221,6 +222,13 @@ public function send(\Psr\Http\Message\RequestInterface $request)
             }
         }
 
+        //set the user-agent
+        $request = $request->withHeader('user-agent', implode('/', [
+            'nexmo-php',
+            self::VERSION,
+            'PHP-' . implode('.', [PHP_MAJOR_VERSION, PHP_MINOR_VERSION])
+        ]));
+
         $response = $this->client->sendRequest($request);
         return $response;
     }

test/ClientTest.php

@@ -239,6 +239,36 @@ public function testNamespaceFactory()
         $this->assertSame($api, $client->sms());
     }
 
+    public function testUserAgentString()
+    {
+        $version = Client::VERSION;
+        $php = 'PHP-' . implode('.', [
+            PHP_MAJOR_VERSION,
+            PHP_MINOR_VERSION
+        ]);
+
+        //get a mock response to test
+        $response = new Response();
+        $response->getBody()->write('test response');
+        $this->http->addResponse($response);
+
+        $client = new Client(new Basic('key', 'secret'), [], $this->http);
+        $request = $this->getRequest();
+
+        //api client should simply pass back the http response
+        $client->send($request);
+
+        //useragent should match the expected format
+        $agent = $this->http->getRequests()[0]->getHeaderLine('user-agent');
+        $expected = implode('/', [
+            'nexmo-php',
+            $version,
+            $php
+        ]);
+
+        $this->assertEquals($expected, $agent);
+    }
+
     /**
      * Allow tests to check that the API client is correctly forming the HTTP request before sending it to the HTTP
      * client.